How can I put a system(speakers and amp) into a taurus with a factory radio? I also have a ranger that has the factory stereo in it and I have two fosgate tens and a fosgate amp in the extended cab of the truck. I was wondering if anyone knows how to do the same with out having to change/buy an aftermarket cd player. I think my truck has some kind of box on the back of the radio that allows me to have the amp hooked up. Any ideas?